Question 1

Which of the following measures would include the standard deviation of a sample?&#10;A)measures of association&#10;B)measures of variability&#10;C)inferential statistics&#10;D)central tendency measures

Accepted Answer

The standard deviation of a sample is a measure of variability, which quantifies the spread or dispersion of a set of data points. Measures of variability include range, variance, and standard deviation, among others.

Question 2

Which value shows how likely it would be to obtain research results if they had occurred by chance?&#10;A)statistical significance&#10;B)chi-squared&#10;C)lambda&#10;D)substantive significance

Accepted Answer

Statistical significance measures the likelihood that research results occurred by chance, indicating whether an observed pattern is due to random variation or a specific intervention or variable.

Question 3

It is easy to find perfect associations in real-world data if the variables are chosen carefully.

Accepted Answer

Real-world data is often complex and noisy, making it rare to find perfect associations between variables, even with careful selection.

Question 4

When conducting multiple regression analysis, researchers are most likely going to be interested in the ______ value. A)chi-squared B)statistical significance C)t-statistic D)R²

Accepted Answer

In multiple regression analysis, researchers are often interested in the R² value as it indicates the proportion of variance in the dependent variable that is predictable from the independent variables.

Question 5

If a researcher is interested in how two variables are related to each other, then they will most likely look at the ______.&#10;A)measures of association&#10;B)measures of variability&#10;C)inferential statistics&#10;D)central tendency measures

Accepted Answer

Measures of association are statistical tools used to quantify the relationship between two variables, making them the most likely choice for a researcher interested in examining how two variables are related.

Question 6

Which of the following variables are most likely to be included in a cross-classification table?&#10;A)ratio&#10;B)quantitative&#10;C)interval&#10;D)categorical

Accepted Answer

Cross-classification tables, also known as contingency tables, are primarily used to summarize and analyze the relationship between two categorical variables. They are not designed to directly handle ratio, quantitative, or interval variables, which are types of numerical data.

Question 7

Lambda and the uncertainty coefficient are most likely reported for variables measured at the ______ level.&#10;A)nominal&#10;B)ratio&#10;C)interval&#10;D)ordinal

Accepted Answer

Lambda and the uncertainty coefficient are statistical measures used for analyzing categorical data, which is data measured at the nominal level. These measures help in understanding the association between categorical variables.

Question 8

______ tells researchers how well they can predict the value of the dependent variable based on the independent variables they have included. A)Chi-squared B)Statistical significance C)T-statistic D)R²

Accepted Answer

The correct choice seems to be a typographical error or a placeholder (D) "R²." In the context of the question, the intended answer likely refers to a measure of fit or predictive power in statistical models, such as R-squared (R²), which tells researchers how well the independent variables predict the value of the dependent variable. However, due to the typo, the exact term intended is unclear, but R-squared is a common measure for this purpose.

Question 9

Standard deviation is only applicable to variables that are measured at interval or ratio levels.

Accepted Answer

Standard deviation is a measure of the dispersion or spread of a set of values, and it assumes that the data are measured on a scale that allows for meaningful comparisons of differences, which is characteristic of interval and ratio levels of measurement.

Question 10

The ______ of the sample tells us which score appeared the most.&#10;A)mean&#10;B)variance&#10;C)mode&#10;D)median

Accepted Answer

The mode of a sample is the value that appears most frequently in the data set.

Question 11

Why would a researcher use inferential statistics?&#10;A)to choose a data collection method&#10;B)to learn more about a population from the sample data&#10;C)to learn about the distribution of the sample data&#10;D)to learn more characteristics of the sample data

Accepted Answer

The answer of Why would a researcher use inferential statistics?&#10;A)to...

Question 12

Cross-classification tables are used to do which of the following?&#10;A)explore the effects of one independent variable&#10;B)report the average scores in a sample&#10;C)show the distribution of a sample&#10;D)examine the relationship between two variables

Accepted Answer

The answer of Cross-classification tables are used to do which...

Question 13

The t test is able to compare two sample means and their variances.

Accepted Answer

The answer of The t test is able to compare...

Question 14

Inferential statistics are the most helpful for researchers who want to summarize their data.

Accepted Answer

The answer of Inferential statistics are the most helpful for...

Question 15

The chi-squared test shows how well a sample represents the associations in the population.

Accepted Answer

The answer of The chi-squared test shows how well a...

Deck 12: Analyzing Data on Families and Children